4-1
Spindle motor does not m ove
Yes
Yes
No
No
No
No
Yes
C heck whether “AVCC”
(+5V) voltage is normal.
Correct connection
C heck the A V C C pow e
supply
C heck/R eplace Q8
、
Q9.
C heck/ R eplace U3.
Have no to focus
1. C heck U3 42pin FOO signals
2.If there are F+, F-, T+ and T-
signals output from U2.
C heck/R eplace the loader
Yes
Yes
No
Go
C heck w hether laser voltage
(2V for VCD & 2.2V for DVD)
on Collector of Q8 and Q9
C heck the FFC connection
betw een 24P and the loader.
1.Whether voltage on pin 44 of U3
varies between 0 and 3.3V (3.3V fo
VCD and 0V for DVD),
2.Whether peripheral com ponents
are eroded or badly soldered.
Trouble shooting chart
Motor no move
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